:root{--bg:#f0f2f5;--card:#fff;--text:#111;--text-secondary:#333;--border:#e5e7eb;--primary:#0052cc;--accent:#ff7d00}
[data-theme="dark"]{--bg:#121212;--card:#1e1e1e;--text:#e0e0e0;--text-secondary:#aaa;--border:#333;--primary:#4d9eff;--accent:#ff9a3e}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;transition:background .3s,color .3s}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 16px}
.header{position:sticky;top:0;left:0;width:100%;background:var(--card);box-shadow:0 2px 12px rgba(0,0,0,.06);z-index:999;border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-left{display:flex;align-items:center;gap:12px}
.logo{height:20px;width:auto;display:block}
.nav-right{display:flex;align-items:center;gap:20px}
.nav-item{position:relative;font-size:15px;font-weight:500;color:var(--text-secondary);padding:8px 0;transition:all .3s ease}
.nav-item::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--primary);transition:width .3s ease}
.nav-item:hover{color:var(--primary)}
.nav-item:hover::after{width:100%}
.nav-item.active{color:var(--text);font-weight:600}
.nav-item.active::after{width:100%}
.setting-btn{color:var(--text-secondary)}
.hero{text-align:center;padding:32px 0}
.hero-title{font-size:42px;font-weight:900;white-space:nowrap;color:var(--text);line-height:1.2;margin-bottom:8px}
.hero-subtitle{font-size:20px;color:var(--text-secondary)}
.carousel{margin:0 auto 24px;width:calc(100% - 10px);height:42vh;border-radius:12px;overflow:hidden;background:var(--border)}
.carousel-item{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;transform:translateX(100%);transition:all .6s cubic-bezier(.25,.8,.25,1)}
.carousel-item.active{opacity:1;transform:translateX(0)}
.carousel-item.prev{transform:translateX(-100%)}
.carousel-img{width:100%;height:100%;object-fit:cover}
.main{padding:32px 0 64px}
.section{margin-bottom:48px}
.card-group{grid-template-columns:1fr;gap:16px}
.card{min-height:50vh;border:none;border-radius:16px}
.footer{background:#111;color:#ccc;padding:40px 0 24px}
.footer-bottom{text-align:center;font-size:13px;color:#666;margin-top:24px}
@media(max-width:768px){.nav-right{gap:14px}.hero-title{font-size:28px}.hero-subtitle{font-size:16px}.carousel{height:220px}}